third_party/WebKit/Source/platform/graphics/ImageBufferSurface.cpp

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#include "platform/graphics/ImageBufferSurface.h"

#include "platform/graphics/GraphicsContext.h"
#include "platform/graphics/ImageBuffer.h"
#include "platform/graphics/StaticBitmapImage.h"
#include "third_party/skia/include/core/SkImage.h"

class SkPicture;

namespace blink {

ImageBufferSurface::ImageBufferSurface(const IntSize& size, OpacityMode opacityMode)
    : m_opacityMode(opacityMode)
    , m_size(size)
{
    setIsHidden(false);
}

ImageBufferSurface::~ImageBufferSurface() { }

PassRefPtr<SkPicture> ImageBufferSurface::getPicture()
{
    return nullptr;
}

void ImageBufferSurface::clear()
{
    // Clear the background transparent or opaque, as required. It would be nice if this wasn't
    // required, but the canvas is currently filled with the magic transparency
    // color. Can we have another way to manage this?
    if (isValid()) {
        if (m_opacityMode == Opaque) {
            canvas()->clear(SK_ColorBLACK);
        } else {
            canvas()->clear(SK_ColorTRANSPARENT);
        }
        didDraw(FloatRect(FloatPoint(0, 0), FloatSize(size())));
    }
}

void ImageBufferSurface::draw(GraphicsContext& context, const FloatRect& destRect, const FloatRect& srcRect, SkXfermode::Mode op)
{
    RefPtr<SkImage> snapshot = newImageSnapshot(PreferNoAcceleration, SnapshotReasonPaint);
    if (!snapshot)
        return;

    RefPtr<Image> image = StaticBitmapImage::create(snapshot.release());
    context.drawImage(image.get(), destRect, &srcRect, op);
}

void ImageBufferSurface::flush(FlushReason)
{
    canvas()->flush();
}

bool ImageBufferSurface::writePixels(const SkImageInfo& origInfo, const void* pixels, size_t rowBytes, int x, int y)
{
    return canvas()->writePixels(origInfo, pixels, rowBytes, x, y);
}

} // namespace blink